chore(deps): Replace serde_yaml with serde_yml

src/admin/Cargo.toml

@@ -85,7 +85,7 @@ futures.workspace = true
 log.workspace = true
 ruma.workspace = true
 serde_json.workspace = true
-serde_yaml.workspace = true
+serde_yml.workspace = true
 tokio.workspace = true
 tracing-subscriber.workspace = true
 tracing.workspace = true